Why not get a new Dell PC with 1 yr warranty D102012 is £163 delivered.
You'd need to allow for a RAM upgrade on top of that, as it comes with 1
gig. Is there anything from the existing machine you could sell to bring it
back into budget? The Dell comes with XP, so maybe you could sell the
exiting Windows licence?
Just a little note of thanks - I offered the charity concerned the range
of possible solutions and they went for yours - the Dell for £163
delivered. They wouldn't have had tat option, without your help, as I
had looked on the Dell site and not found anything remotely that cheap.
Many thanks to the others that made it possible for me to give them such
a good range of options - it was the Dell warranty that swung it, I may
not be around to sort out their problems for a whole lot longer.